US2782004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of pulling a drill string
Assignee: Individual
•
Filing: 1952-04-23
•
Granted: 1957-02-19
•
Expires: 1972-04-23
Abstract
No abstract record available.
Inventors
- 👤 Harrigan Daniel Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:23
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49819
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1600439A
Cited
US1894039A
Cited
US1972635A
Cited
US2076379A
Cited
US2240738A
Cited
US2200075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |